辐射冷却
热舒适性
阿什拉1.90
热的
工作温度
材料科学
辐射采暖
冷却能力
被动冷却
自由冷却
辐射冷却
传热
热辐射
环境科学
气象学
核工程
水冷
平均辐射温度
热质量
保温
主动冷却
空调
散热器(发动机冷却)
天花板(云)
热流密度
暖通空调
红外线的
辐射热
散热片
热力学
复合材料
工程类
物理
气候变化
生物
生态学
作者
Yuying Liang,Nan Zhang,Huijun Wu,Xinhua Xu,Ke Du,Jianming Yang,Qin Sun,Dong Kaijun,Shengwei Wang
标识
DOI:10.1016/j.buildenv.2021.108342
摘要
A decoupled radiant cooling unit (DRCU), which uses an infrared-transparent and conductive resistant (ItCr) layer to cover the radiant cooling surface and prevent it from contacting with air, reduces the condensation risk and simultaneously increases the cooling capacity. The cooling capacity could be enhanced using a low radiant cooling temperature (e.g., <15.0 °C), which is lower than conventional cooling capacity (e.g., 18.3 °C). However, one interesting problem under low radiant cooling temperatures is whether the thermal environment and thermal comfort built by the DRCU will be significantly affected. The present study developed a computational fluid dynamic model to investigate the thermal environment created by a DRCU inside a small chamber. Four cases with the radiant cooling temperatures of 18.3 °C, 14.7 °C, 9.5 °C and −2.3 °C and radiant cooling areas of 9.0 m2, 7.2 m2, 5.4 m2 and 3.6 m2 were investigated. The thermal environment was evaluated using temperature and velocity distributions, and the thermal comfort was evaluated through predicted mean vote (PMV), predicted percentage dissatisfied (PPD) and percentage dissatisfied (PD). The results indicated that the thermal environment and thermal comfort created by the DRCU under low radiant cooling temperatures satisfied the comfort criteria of the ASHRAE Standard.
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